Task 2.1: Determine the impact of acidification on the distribution and fluxes of nutrients in sediment
Henrik Stahl, SAMS
H0 Elevated CO2 x temperature will have no significant impact on key sedimentary biogeochemical processes.
Alteration of pH and pCO2 is expected to directly affect microbial communities within surface sediments and, therefore, benthic carbon and nitrogen cycling.
In Task 2.1, we will set up a series of medium-term (3-6 mth) experiments at the flume facility at SAMS. Impact of elevated CO2 x temperature on sediment geochemistry (e.g. redox, chemical distributions, alkalinity generation) and nutrient cycling processes (e.g. nitrification, denitrification, anammox) will be quantified for four different sediment types within flumes; cohesive muds, silicate sands, carbonate sands and maerl.